Ixodes spp. (Acari: Ixodidae) ticks in Rio Grande do Sul state, Brazil

2017 ◽  
Vol 22 (12) ◽  
pp. 2057 ◽  
Author(s):  
Thais Michel ◽  
Ugo Souza ◽  
Bruno DallAgnol ◽  
Anelise Webster ◽  
Felipe Peters ◽  
...  
Keyword(s):  
Rio Grande ◽  
Molecular Techniques ◽  
Rio Grande Do Sul ◽  
Small Rodents ◽  
Wild Rodents ◽  
Pampa Biome ◽  
Potential Impact ◽  
Akodon Azarae ◽  
Oligoryzomys Flavescens ◽  
Cavia Aperea

Among the 251 described species of ticks from the genus Ixodes, only eight were previously reported in Brazil, Ixodes amarali, Ixodes aragaoi, Ixodes auritulus, Ixodes fuscipes, Ixodes loricatus, Ixodes luciae, Ixodes paranaensis and Ixodes schulzei. Of those species, I. loricatus is considered commonly found, whereas I. auritulus and I. aragaoi were registered just one time in Rio Grande do Sul (RS) state, Southern Brazil. This paper aims to update the Ixodes species occurring in RS through the investigation of the ixodofauna of small rodents. Data from 314 wild rodents were analyzed from nine municipalities of Pampa biome and five from the Atlantic Rainforest in RS. Rodents belonging to the following species were infested by Ixodes spp. ticks: Akodon azarae, Akodon montensis, Akodon paranaensis, Akodon reigi, Calomys laucha, Delomys dorsalis, Deltamys kempi, Holochilus brasiliensis, Oligoryzomys flavescens, Oligoryzomys nigripes, Oxymycterus nasutus, Scapteromys tumidus (Cricetidae) and Cavia aperea (Caviidae). The tick identification was performed based on morphological dichotomous keys, their updates and by molecular techniques. Considering the ticks from the rodents and those collected directly from the environment, 34 specimens of Ixodes spp. were collected. Our results improved to five the list of Ixodes species that occur in RS: I. loricatus, I. auritulus, I. aragaoi, I. fuscipes and I. longiscutatus. Moreover, the finding of I. longiscutatus increases to nine the number of Ixodes species in Brazil. The occurrence of two species of the Ixodes ricinus complex (I. aragaoi and I. fuscipes) highlights the potential impact of Ixodes spp. ticks on public health.

scholarly journals Reptiles of the Parque Estadual de Itapuã, state of Rio Grande do Sul, southern Brazil

Check List ◽  
2012 ◽  
Vol 8 (5) ◽  
pp. 847 ◽  
Author(s):  
Gilberto Alves de Souza Filho ◽  
Laura Verrastro
Keyword(s):  
Rio Grande ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Conservation Unit ◽  
Pampa Biome

Herein we provide a list of reptiles from Parque Estadual de Itapuã, a conservation unit of integral protection located in the municipality of Viamão, state of Rio Grande do Sul, southern Brazil and inserted in the domains of the Pampa Biome. The study was carried out from February 2003 to July 2004. We recorded 39 species: 23 snakes, eight lizards, four testudines, three amphisbaenians and one crocodilian. Through the knowledge of the species in the area, we justify the importance of preserving this important natural remnant.

scholarly journals Descrição do sincrânio de Cavia aperea (Rodentia, Caviidae) e comparação com as demais espécies do gênero no Brasil

2012 ◽  
Vol 52 (3) ◽  
pp. 21-50 ◽  
Author(s):  
Jorge José Cherem ◽  
Jorge Ferigolo
Keyword(s):  
Rio Grande ◽  
Minas Gerais ◽  
Rio Grande Do Sul ◽  
Santa Catarina ◽  
Cavia Aperea

O gênero Cavia inclui quatro espécies no Brasil, C.aperea (pelo menos duas subespécies, C.a.aperea e C.a.pamparum), C.magna, C.intermedia e C.fulgida. Visando contribuir para o conhecimento da anatomia e para a distinção dessas espécies, descreve-se o sincrânio (crânio e mandíbula) de exemplares de C.a.pamparum do Rio Grande do Sul e compara-se com exemplares de C.magna deste estado e de Santa Catarina, C.intermedia da ilha de Moleques do Sul, na costa catarinense, e C.fulgida de Minas Gerais e Paraná. Cavia aperea possui crânio baixo e longo; rostro comprimido lateralmente; constrição interorbital marcada; órbita elíptica com ampla comunicação com a fossa temporal; forâmen infra-orbital amplo e deprimido; mandíbula longa e baixa, com processo angular não refletido lateralmente; fórmula dentária 1I.0C.1P.3M; dentes hipselodontes; molariformes formados por dois prismas, o anterior laminar e o posterior cordiforme. Cavia aperea distingue-se de C.magna pelo menor desenvolvimento da porção rostral do crânio e da raiz ventral do processo zigomático do maxilar; forâmen infraorbital mais deprimido; porção posterior dos frontais e parietais menos convexos; apófises paraoccipitais mais curtas e curvas anteriormente; incisivos superiores mais estreitos e geralmente opistodontes (proodontes em C.magna); fenda terciária externa (fte) mais profunda e com mais cemento; prolongamento anterior à fte mais desenvolvido e constrição na base do prolongamento posterior. Cavia intermedia possui jugal curto; fossa jugal reduzida/ausente; depressão na região interorbital bem marcada; crista sagital larga; constrição lateral no basisfenóide tênue; forâmen magno amplo; supra-occipital baixo; fte rasa e prolongamento anterior pouco desenvolvido; p4 com prisma posterior tão largo quanto o anterior; m3 com prisma anterior mais largo que o posterior e fenda secundária interna menos profunda. Cavia fulgida caracteriza-se por suas dimensões menores e fte muito profunda. Entretanto, exemplares do sul do Brasil com estes caracteres, mas coloração não típica de C.fulgida, podem pertencer à C.aperea, sendo necessários mais estudos para esclarecer esta questão.

scholarly journals Preliminary dragonfly (Odonata) species list from the Pampa biome in Rio Grande do Sul, Brazil, with ecological notes for 19 new records for the State

2017 ◽  
Vol 17 (4) ◽  
Author(s):  
Samuel Renner ◽  
Eduardo Périco ◽  
Gerson Júnior Ely ◽  
Göran Sahlén
Keyword(s):  
Rio Grande ◽  
The State ◽  
Water Bodies ◽  
Rio Grande Do Sul ◽  
Species List ◽  
Surrounding Water ◽  
Pampa Biome ◽  
Small Streams ◽  
Biogeographical Region ◽  
Southern Half

Abstract An inventory of Odonata was carried out in the southern half of the state of Rio Grande do Sul, Brazil, in the Pampa biome. Originally, this biogeographical region was covered mostly by open fields and grassland, with sections of higher vegetation surrounding water bodies and rocky hills. Today the landscape is fragmented due to agricultural activities, mainly cattle farming, rice crops and forest plantations. Our survey was conducted in three municipalities from this region, between March 2015 and April 2016. Aiming at a general overview of the species composition, our sampling sites were selected on a wide basis, including lakes, bogs, temporary water bodies, small streams and river sections. Eighty two species of Odonata were collected comprising 40 genera and seven families. The dominant families were Libellulidae (56,1%), Coenagrionidae (24,5%) and Aeshnidae (7,3%). We found a diverse odonate assemblage, adding 19 new species records for the state of Rio Grande do Sul.

scholarly journals Semiaquatic bugs (Hemiptera, Heteroptera, Gerromorpha) from Rio Grande do Sul, southern Brazil

Check List ◽  
2021 ◽  
Vol 17 (5) ◽  
pp. 1323-1343
Author(s):  
Juliana Mourão dos Santos Rodrigues ◽  
Oséias Martins Magalhães ◽  
Evaldo Alves Joaquim Júnior ◽  
José Ricardo Inacio Ribeiro ◽  
Felipe Ferraz Figueiredo Moreira
Keyword(s):  
Atlantic Forest ◽  
New Records ◽  
Rio Grande ◽  
The State ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Pampa Biome ◽  
First Time

Rio Grande do Sul (RS) is the southernmost state in Brazil and includes areas within the Pampa and Atlantic Forest biomes. The semiaquatic bugs (Hemiptera, Heteroptera, Gerromorpha) from RS are poorly known, with only 14 previously recorded species. We carried out two expeditions in this state, in 2002 and 2019, across 19 municipalities. Here, we provide new records for 19 species, of which 13 are recorded for the first time from the state, five have their distributions expanded, and one is recorded again from a same locality previously reported in the literature. Furthermore, 13 species were collected for the first time in the Pampa biome and one in the Atlantic Forest.

Water body type and land cover shape the dragonfly communities (Odonata) in the Pampa biome, Rio Grande do Sul, Brazil

2018 ◽  
Vol 22 (1) ◽  
pp. 113-125 ◽  
Author(s):  
Samuel Renner ◽  
Eduardo Périco ◽  
Marina Schmidt Dalzochio ◽  
Göran Sahlén
Keyword(s):  
Land Cover ◽  
Water Body ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Body Type ◽  
Pampa Biome

scholarly journals Nitrogen fertilization in the growth phase of 'Chardonnay' and 'Pinot Noir' vines and nitrogen forms in sandy soil of the Pampa Biome

Revista CERES ◽  
2017 ◽  
Vol 64 (4) ◽  
pp. 433-440 ◽  
Author(s):  
Felipe Lorensini ◽  
Carlos Alberto Ceretta ◽  
Lessandro De Conti ◽  
Paulo Ademar Avelar Ferreira ◽  
Max Kleber Laurentino Dantas ◽  
...  
Keyword(s):  
Plant Height ◽  
Sandy Soil ◽  
Nitrogen Fertilization ◽  
Dry Matter ◽  
Rio Grande ◽  
Pinot Noir ◽  
Rio Grande Do Sul ◽  
Mineral N ◽  
Total N ◽  
Pampa Biome

ABSTRACT Information on nitrogen fertilization in growing vines is still a very limited subject, especially for crops on sandy soils in the Pampa Biome in Rio Grande do Sul, where viticulture has expanded considerably in the last decade. This study aimed to assess the impact of N doses on growth of young plants of Chardonnay and Pinot Noir vines and N forms present in sandy soil in the Pampa Biome. The experiment was conducted from October 2011 to December 2012 in a vineyard in Santana do Livramento, in Southern Rio Grande do Sul State, in soil with 82 g kg-1 clay in the 0-20 cm layer. Vines of Chardonnay and Pinot Noir varieties were subjected to applications of 0, 10, 20, 40, 60, and 80 kg N ha-1 year-1. Total N in leaves, SPAD readings, stem diameter, plant height, and dry matter of the pruned material were evaluated in two growth cycles and three times. Soil samples were collected at 0-10 and 10-20 cm depths at four crop growth stages, in which N-NH4 +, N-NO3 -, and total N were analyzed and the mineral N was calculated. The N levels applied to young vines, although they did not provide relevant changes in the N-NH4 +, N-NO3 -, and mineral N contents in the soil, were able to increase the N content in the leaves, increasing plant vigor. because the reason is that there was an increase in stem diameter, plant height, and dry matter of pruned material in most evaluation periods. These parameters suggest better growth patterns and uniformity of young grapevines with possible positive effects in anticipation of production, demonstrating the importance of nitrogen fertilization strategies to the growing vines in the sandy soil conditions of the Pampa Biome.

scholarly journals Ticks infesting wild small rodents in three areas of the state of São Paulo, Brazil

2016 ◽  
Vol 46 (5) ◽  
pp. 871-875 ◽  
Author(s):  
Thiago Fernandes Martins ◽  
Marina Gea Peres ◽  
Francisco Borges Costa ◽  
Thais Silva Bacchiega ◽  
Camila Michele Appolinario ◽  
...  
Keyword(s):  
Sao Paulo ◽  
Species Level ◽  
São Paulo ◽  
Small Rodents ◽  
Wild Rodents ◽  
Morphological Examination ◽  
Paulo State ◽  
The Mean ◽  
Oligoryzomys Flavescens ◽  
Mitochondrial Rdna

ABSTRACT: From May to September 2011, a total of 138 wild rodents of the Cricetidae family were collected in the cities of Anhembi, Bofete and Torre de Pedra, in São Paulo State. All animals were examined for the presence of ticks, which were collected and identified at species level in the laboratory by morphological examination (for adults, nymphs and larvae) and molecular biology, by sequencing of a fragment of the 16S mitochondrial rDNA (for larvae). A total of 47 ticks (21 larvae and 26 nymphs) were collected from rodents, identified as 21 larvae and 23 nymphs of Amblyomma ovale (collected on Oligoryzomys nigripes , Oligoryzomys flavescens , Sooretamys agouya and Nectomys squamipes ), two nymphs of Ixodes schulzei (O. nigripes and O. flavescens ) and an Amblyomma sculptum nymph in S. agouya . The overall prevalence of parasitism by A. ovale was 4.3% for larvae, and 10.1% for nymphs. The mean intensity of parasitism was 3.5 larvae/parasitized animal, and 1.6 nymphs/parasitized animal. One O. nigripes was found parasitized by both larva and nymph of A. ovale , and another O. nigripes was parasitized simultaneously by an I. schulzei nymph and five A. ovale nymphs. This research reports the following unpublished records: A. ovale on O. flavescens , O. nigripes and S. agouya ; A. sculptum on S. agouya ; and I. schulzei on O. flavescens and O. nigripes .

scholarly journals Land use changes after the period commodities rising price in the Rio Grande do Sul State, Brazil

2017 ◽  
Vol 47 (4) ◽  
Author(s):  
Vicente Celestino Pires Silveira ◽  
◽  
José Antonio González ◽  
Eliana Lima da Fonseca ◽  
◽  
...  
Keyword(s):  
Land Use ◽  
Atlantic Forest ◽  
Rio Grande ◽  
Raw Material ◽  
Biodiesel Production ◽  
World Population ◽  
Rio Grande Do Sul ◽  
Early 21St Century ◽  
Pampa Biome ◽  
The Impact

ABSTRACT: At the end of the 20th and early 21st century, agricultural systems incorporated definitively a new mission: to generate goods for a world population that continues to grow and whose way of life demand food with low environmental impact. Soybean is the main raw material for the production of biodiesel in Brazil, accountably responsible for 82.4% of the total produced between 2006 and 2013. The Brazilian state of Rio Grande do Sul (RS), which is formed by the Pampa and the Atlantic forest biomes, was responsible for 35.7% of the country's biodiesel production in the referred period. The aim of this paper was to verify the impact of the increased area of soybean cultivation in land use in Rio Grande do Sul State, in the period between 1990 and 2015, considering separately its two biomes (Pampa and Atlantic Forest) original areas, using both census dataset and satellite images. We used the period from 1990 to 2000 as before commodity rising price (BCRP) and the period from 2000 to 2013 as commodity rising price (CRP). The 505,162 ha from Atlantic Forest biome and 1,192,115ha from Pampa biome were added to soybean production in the CRP period. In the Atlantic Forest, this enlargement occurred in the border of the main production area, while in Pampa biome conversion of natural grassland to crop land was the main reason for the large increment in the cultivated area.

scholarly journals Mammalia, Chiroptera, Molossidae, Molossus rufus É. Geoffroy, 1805: Distribution extension

Check List ◽  
2012 ◽  
Vol 8 (2) ◽  
pp. 291
Author(s):  
Felipe B. Peters ◽  
Paulo Ricardo de O. Roth ◽  
Alexandre U. Christoff
Keyword(s):  
Geographical Distribution ◽  
Atlantic Forest ◽  
New Records ◽  
Rio Grande ◽  
The State ◽  
Rio Grande Do Sul ◽  
Southern Limit ◽  
Pampa Biome ◽  
Forest Biome

This paper presents seven new records of occurrence of Molossus rufus for the state of Rio Grande do Sul, Brazil, three from the Atlantic Forest Biome and four from the Pampa Biome. The southern limit of the known geographical distribution of this species in Brazil is extended by 159 km.

scholarly journals RELATIONSHIP BETWEEN ARBOREAL, TOPOGRAPHIC, AND EDAPHIC STRUCTURES IN A STRETCH OF A RIPARIAN FOREST IN THE PAMPA BIOME, RIO GRANDE DO SUL, BRAZIL

FLORESTA ◽  
2019 ◽  
Vol 49 (4) ◽  
pp. 773
Author(s):  
Ana Claudia Bentancor Araujo ◽  
Helio Junior Bentancor Araujo ◽  
Edenir Luis Grimm ◽  
Solon Jonas Longhi
Keyword(s):  
Natural Regeneration ◽  
Environmental Variables ◽  
Riparian Forest ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Natural Area ◽  
Eugenia Uniflora ◽  
Main Species ◽  
Pampa Biome ◽  
Considerable Loss

Despite the considerable loss of natural area in the Pampa biome, the number of scientific studies carried out here is low; it is lower in terms of natural regeneration. Therefore, the present study analyzed arboreal shrub and natural regeneration as well as the influence of environmental variables on the distribution of a riverine forest of the Espinilho stream in the Pampa biome, Rio Grande do Sul. A hundred plots were systematically set for arboreal shrub sampling. To evaluate the regenerating component, two classes were established: Class I and Class II. The main species in the arboreal shrub were Ocotea acutifolia (Nees) Mez and Pouteria salicifolia (Spreng.) Radlk., while those in natural regeneration were Eugenia uniflora L. and Blepharocalyx salicifolius (Kunth) O.Berg. The characteristics of the relief, soil, and canopy conditioned the species of the arboreal shrub and regenerating strata. 

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